Kamil Gorlo created HIVE-9123:
---------------------------------
Summary: Query with join fails with NPE when using join auto
conversion
Key: HIVE-9123
URL: https://issues.apache.org/jira/browse/HIVE-9123
Project: Hive
Issue Type: Bug
Affects Versions: 0.13.1
Environment: CDH5 with Hive 0.13.1
Reporter: Kamil Gorlo
I have two simple tables:
desc kgorlo_comm;
+-----------+------------+----------+--+
| col_name | data_type | comment |
+-----------+------------+----------+--+
| id | bigint | |
| dest_id | bigint | |
+-----------+------------+----------+--+
desc kgorlo_log;
+-----------+------------+----------+--+
| col_name | data_type | comment |
+-----------+------------+----------+--+
| id | bigint | |
| dest_id | bigint | |
| tstamp | bigint | |
+-----------+------------+----------+--+
With data:
select * from kgorlo_comm;
+-----------------+----------------------+--+
| kgorlo_comm.id | kgorlo_comm.dest_id |
+-----------------+----------------------+--+
| 1 | 2 |
| 2 | 1 |
| 1 | 3 |
| 2 | 3 |
| 3 | 5 |
| 4 | 5 |
+-----------------+----------------------+--+
select * from kgorlo_log;
+----------------+---------------------+--------------------+--+
| kgorlo_log.id | kgorlo_log.dest_id | kgorlo_log.tstamp |
+----------------+---------------------+--------------------+--+
| 1 | 2 | 0 |
| 1 | 3 | 0 |
| 1 | 5 | 0 |
| 3 | 1 | 0 |
+----------------+---------------------+--------------------+--+
Following query fails in second stage of execution:
select v.id, v.dest_id from kgorlo_log v join (select id, dest_id, count(*) as
wiad from kgorlo_comm group by id, dest_id)com1 on com1.id=v.id and
com1.dest_id=v.dest_id;
with following exception:
2014-12-16 17:09:17,629 ERROR [uber-SubtaskRunner]
org.apache.hadoop.hive.ql.exec.MapJoinOperator: Unxpected exception: null
java.lang.NullPointerException
at
org.apache.hadoop.hive.ql.exec.MapJoinOperator.getRefKey(MapJoinOperator.java:198)
at
org.apache.hadoop.hive.ql.exec.MapJoinOperator.computeMapJoinKey(MapJoinOperator.java:186)
at
org.apache.hadoop.hive.ql.exec.MapJoinOperator.processOp(MapJoinOperator.java:216)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:796)
at
org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:92)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:796)
at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:540)
at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:177)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:450)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.runSubtask(LocalContainerLauncher.java:370)
at
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.runTask(LocalContainerLauncher.java:295)
at
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.access$200(LocalContainerLauncher.java:181)
at
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler$1.run(LocalContainerLauncher.java:224)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
2014-12-16 17:09:17,659 FATAL [uber-SubtaskRunner]
org.apache.hadoop.hive.ql.exec.mr.ExecMapper:
org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while
processing row {"_col0":1,"_col1":2}
at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:550)
at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:177)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:450)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.runSubtask(LocalContainerLauncher.java:370)
at
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.runTask(LocalContainerLauncher.java:295)
at
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.access$200(LocalContainerLauncher.java:181)
at
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler$1.run(LocalContainerLauncher.java:224)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Unxpected
exception: null
at
org.apache.hadoop.hive.ql.exec.MapJoinOperator.processOp(MapJoinOperator.java:254)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:796)
at
org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:92)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:796)
at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:540)
... 13 more
Caused by: java.lang.NullPointerException
at
org.apache.hadoop.hive.ql.exec.MapJoinOperator.getRefKey(MapJoinOperator.java:198)
at
org.apache.hadoop.hive.ql.exec.MapJoinOperator.computeMapJoinKey(MapJoinOperator.java:186)
at
org.apache.hadoop.hive.ql.exec.MapJoinOperator.processOp(MapJoinOperator.java:216)
... 17 more
When I set hive.auto.convert.join=false everything works.
Here are explains with this variable turnet off and on:
https://gist.github.com/kgs/20db747c8d81d94ac20e
https://gist.github.com/kgs/63bc1fc148354b98a63e
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